Thanks for posting to community @c10dores!
Your GMC has an integrated Pandora app, so you won't need to connect your phone to your car in order to listen in your GMC.
I do see that your Pandora account has been associated with your GMC. I've asked our User Support team to remove this connection and I'd like for you to go ahead and try to reconnect Pandora on your GMC.
Let me know if you're still seeing the connection message coming up. 👍🏻
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